Question

I’m still a newbie to Adobe Air/Flex, and still fairly new with SQL.

I’ve downloaded this (http://coenraets.org/blog/2008/11/using-the-sqlite-database-access-api-in-air…-part-1/) code and have been looking over it and I’m trying to implement the same idea.

I think it’s just something stupid. I’m using Flex Builder. I made a new desktop application project, didn’t import anything.

I added a DataGrid object and bound it to an ArrayCollection:

I’m trying to make it so when the program initializes it will load data from a database if it exists, otherwise it’ll create a new one.

The problem is, when the application runs, the datagrid is empty. No column headers, no data, nothing. I’ve tried changing a whole bunch of stuff, I’ve used the debugger to make sure all the functions are being called like they’re supposed to. I don’t know what I’m doing wrong. I’ve compared my code to the before mentioned code, I’ve looked for tutorials on Google. Anyone know what I’m doing wrong?

<?xml version='1.0' encoding='utf-8'?> <mx:WindowedApplication xmlns:mx='http://www.adobe.com/2006/mxml' layout='absolute' width='672' height='446'     applicationComplete='onFormLoaded()'     title='iRecipes'>      <mx:Script>         <![CDATA[             import mx.collections.ArrayCollection;              private var sqlConnection:SQLConnection;             [Bindable] private var recipeList:ArrayCollection;              private function onFormLoaded():void             {                 sqlConnection = new SQLConnection();                 openDataBase();             }              private function openDataBase():void             {                 var file:File = File.userDirectory.resolvePath('recipes.db');                  sqlConnection.open(file, SQLMode.CREATE);                  if(!file.exists)                 {                     createDatabase();                 }                             populateRecipeList()             }              private function createDatabase():void             {                 var statement:SQLStatement = new SQLStatement();                 statement.sqlConnection = sqlConnection;                 statement.text = 'CREATE TABLE Recipes (recipeId INTEGER PRIMARY KEY AUTOINCREMENT, recipeName TEXT, authorName TEXT)';                 statement.execute();                  statement.text = 'INSERT INTO Recipes (recipeName, authorName) VALUES (:recipeName, :authorName)';                  statement.parameters[':recipeName'] = 'Soup';                 statement.parameters[':authorName'] = 'Joel Johnson';                 statement.execute();                  statement.parameters[':recipeName'] = 'Garbage';                 statement.parameters[':authorName'] = 'Bob Vila';                 statement.execute();             }              private function populateRecipeList():void             {                 var statement:SQLStatement = new SQLStatement();                 statement.sqlConnection = sqlConnection;                  statement.text = 'SELECT * FROM Recipes';                 statement.execute();                 recipeList = new ArrayCollection(statement.getResult().data);             }         ]]>     </mx:Script>      <mx:DataGrid dataProvider='{recipeList}'>      </mx:DataGrid> </mx:WindowedApplication> 

Answer 1

I just tried this out using your code. I made a change and removed the condition as I was getting errors about the table not existing.

 //if(!file.exists)  //{    createDatabase();  //} 

This got the datagrid showing the correct info. I think that there is something wrong with the way you are initialising the database file. I’m having a look into it at the moment.

Try using

sqlConnection.open(file, SQLMode.CREATE); 

instead, for opening the database.